In the framework of a heater experiment at the Meuse/Haute-Marne rock laboratory, DBE TECHNOLOGY and Dynardo performed an analysis of the rock behaviour in response to heating. New approaches describing rock permeability as a function of stress and plastic strain were used, and statistical methods for parameter identification were applied. The methods comprise automatic sensitivity analysis and optimization algorithms that allow a parameter fitting and an analysis of the importance of individual parameters for the general system development. The identification process resulted in a parameter set that allows a good description of the rock behaviour while being heated.